A u boat is a submarine basically and it was armed with missiles and it was Nazi germany
Answer:incumbent:the holder of an office or post.
challenger:a person who engages in a contest.
liberal: (in a political context) favoring maximum individual liberty in political and social reform.
conservative: holding to traditional attitudes and values and cautious about change or innovation, typically in relation to politics or religion.
moderate:average in amount, intensity, quality, or degree.
front-runner: the contestant that is leading in a race or other competition.
dark horse:a candidate or competitor about whom little is known but who unexpectedly wins or succeeds.
Answer: Multilateral or international agreement.
Explanation:
This agreement is an agreement between two, three, or more entities supported by international legal norms. This type of contract is most often concluded between states and is a legal act that must be respected. This contract originated in Vienna in 1969, and the contract came into practice 11 years later. The convention is currently accepted and signed by about 116 countries around the world.
